Sketch one full period of the am wave, Electrical Engineering

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Q. Let a(t) = [1 + mAx(t)] and x(t) = cos 2πfmt, fm << fc, and xc(t) = A(t) cos 2πfct .

(a) With mA =1, sketch one full period of the AM wave and draw the envelope by connecting the positive peaks of xc(t).

(b) Repeat part (a) with mA = 2, and notice that the carrier is overmodulated and the envelope does not have the same shape as x(t).


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